www.Primo.com: Did you know About Cucumber.

Trepang ( sea cucumber ) or Holothuroidea are echinoderms similar to sea urchins and starfish .
Sea cucumbers have a worm-like body with a soft body .

These animals can be found in almost every marine environment , although tropical coral reefs in shallow waters is their favorite place to live .
Sea cucumbers inhabit the sea floor and are sometimes seen half buried .
These organisms move on the seabed using hundreds of tiny suction organs contained in their tubular legs .

Different Types of Sea Cucumber.

The oldest fossils of sea cucumbers are spicules that lived about 425 million to 405 million years ago .
Currently , there are about 1,400 species of sea cucumber in various shapes and sizes .
Various species of sea cucumbers length ranging from 1 cm to 20 cm .
One of the giant sea cucumber species that Synapta maculata can grow up to 5 m in length .
Most species of sea cucumbers live on the ocean floor , while others live floats follow ocean currents as plankton .

Food cucumbers .

Generally , sea cucumbers are scavengers that means eating the remains of organisms on the sea floor .
Most sea cucumbers eat the organic material , small algae , plankton , and small marine animals .

Breeding .

Sea cucumbers can reproduce both asexually and sexually .
Fertilization in sexual reproduction occurs externally (outside the mother 's body).
In the case of external fertilization , the sperm and egg cells are released into the water for fertilization later .
In order for a greater likelihood of fertilization , sperm and egg cells are released should amount to much .

Defense Mechanisms .

When it feels threatened , some types of sea cucumbers will release the sticky threads to trap their enemies .
Other species mutilate the body as a defense mechanism .
Various species of fish and other aquatic animals prey on sea cucumbers , particularly eggs and larvae .
Several types of sea cucumbers cultivated even as a delicious food source .

Mollusks .

Mollusks are organisms that have a hard outer shell .
Members of this phylum include various species of animals that are very diverse in the world .
Mollusks include invertebrate animals , which means it does not have a spine .

1 . General Characteristics of Mollusks

There are more than 85,000 species of mollusks that have been identified .
Contribute about 23 percent of all marine organisms , mollusks are considered as the largest phylum GCC inhabit the marine world .
Under the body there is a hard shell that is soft and vulnerable to predators drying .
That's because, the structure serves as a protective shell for mollusks .

2 . Classification.

The name is derived from the Latin word mollusc ' molluscus ' which means ' soft body ' .
Mollusc species grouped under the mollusk phylum and superphylum Lophotrochozoa .
Phylum is then classified into class 7-9 , where gastropods are the largest group .

3 . Habitat.

Mollusks are found in very diverse environments , including mountains in the highlands to the sea .
They live in gardens , large trees , dense forests , ponds , rivers , estuaries , deserts , until the ocean floor .

4 . tool Motion.

Some water mollusks are reliable swimmers , while others are stationary animals that remain attached to rocks , soil , or plant part .
Most mollusks live underground because they explore its capabilities .

5 . Size.

The size ranges from a few millimeters mollusks up to 70 meters in the case of some species of squid .
Giant squid , was recorded as the largest invertebrate animal species , has a body length of about 12 m and tentacles measuring about 50 m .
Likewise , small mollusks weight ranges only a few milligrams , while the adult giant squid weighing up to 270 kg .

6 . Examples of Species.

Nudibranch mollusc is a group known for their bright colors .
Some examples of other mollusks including snails , oysters , mussels , squid , octopus , etc. .

7 . Body Parts.

Mollusks have soft bodies with no legs , does not have a skeleton , and including the cold-blooded animals .
The mollusk body consists of three basic parts , the head , mantle , and foot muscles .
The coat is part of the fabric which secrete shells . Some species have an internal skeleton , such as squid and octopus .
Mollusks have all the major organ systems such as the brain , heart , kidney , and gills .
Eating habits vary according to the species of mollusks . Reproduction takes place in a sexual way .
So , thank you for reading this article. Written and posted by Bambang Sunarno.
sunarnobambang86@gmail.com
author:
http://schema.org/Personal.
https://plus.google.com/105319704331231770941.
name: Bambang Sunarno.
http://primadonablog.blogspot.com/2014/02/did-you-know-about-cucumber.html
DatePublished: February 05, 2014 at 22:15

7MHPNPADAEFW